The most widely used name is mud or drilling mud and both these terms will be used interchangeably throughout this chapter. Formulas and calculations for drilling operations, 2nd. The mathematics of directional drilling bit by bit 0m sea relief targetbed kick off point end of build first bit. Powered by schlumberger oilfield glossary, a ed work of schlumberger. Drilling fluid calculations archives drilling formulas and drilling. Hydrostatic pressure increases as the depth increases. Drilling mud, also referred to as drilling fluid, is used to clear the hole of debris created during the drilling process, to cool down the. These calculations include increase mud density, dilution, mixing fluids of different densities, oilbased mud calculations, solids analysis, solids fractions, dilution of mud system, displacementrequiring barrels of waterslurry, evaluation of hydrocyclone, and evaluation of the centrifuge. Drilling fluids manual proprietary for the exclusive use of amoco production company and other wholly owned subsidiaries of amoco corporation.
Viscosity is a measure of the drilling fluids internal resis. Formulas and calculations for drilling, production and. Hdd drilling fluid calculator based on a 500 gallon mix tank. It is essential, especially in highpressure hightemperature hpht wells using oil based muds, to account for the effects of temperature and pressure on the mud density. Pdf formulas and calculations for drilling, production and. It contains links to help you navigate in an on screen document. Determine the number of sacks of barite required to increase the density of 100bbl of 12.
Mathcad is brilliant software for serious calculations, far superior to excel or your local calculator. Iwcf uk branch distance learning programme drilling calculations part 3 section 1 14 of 143 lets look again at the pressure exerted by drilling mud in a well. Drilling formulas and definitions sandvik coromant. Links can connect parts of a document, jump to other pdf documents, or open another application file. All formulas and calculations are presented in easytouse, stepbystep order, virtually all the mathematics. Severe problems arise when drilling fluids invade high permeability conductive fractures that the well path intercepts. Calculations mud engineering drilling fluids solutions. Volume increase, bbl, due to mud weight increase with barite.
Virtually all the mathematics required on a drilling rig is here in one convenient source, including formulas for pressure gradient. Formulas and calculations for drilling, production and workover formulas and calculations. Drilling numericals rig components, ton miles, circulation, mud pump, drillstring data, bha selection, kick and kill calculations, maasplot, directional well profiles, cementing. Drilling mud calculations free download as pdf file. Introduction iadc international association of drilling.
The first step is to compute the system volume, which is the sum of the mud in the hole and surface pits. Provide an explanation of mud properties as they are reported on a morning report. Loss of hydrostatic pressure due to filling water into annulus in case of lost return. Mud engineering calculations terminology references. Mud engineering this chapter covers the following items.
One of the advantages of mathcad is that it understands units. Diameter in2 bbls1,000 ft buoyancy factor 1 mud weight lbgal x 0. Hydrostatic pressure increases as the mud density increases. Formulas and calculations for drilling production and workover 2e. Drilling fluids formulas and calculations netwas group oil. The baroid fluids handbook has been converted from its original format into adobe document format in lotus notes, allowing it to be viewed, copied from, and printed easily. Drilling engineering a distributed learning course forward the drilling engineering workbook is a correspondence distributed learning course which covers the important elements of drilling a well. Engineering calculations agip kco well area operations drilling muds engineering calculations map1 drilling supervisors training course rpw2021a 1 introduction this section is a guide for calculations regarding the drilling fluid such as capacity of mud, tanks volumes, tubulars and holes, circulation times, velocity of the mud in the annular and in the drill pipes. In this video, sebastian walks us through how to calculate your mud weight as well as your mud weight window.
As previously stated there is oilbased and waterbased mud. Formulas and calculations for drilling, production, and. May 15, 2020 mud weight, ppg, increase with barite average specific gravity of barite 4. It also serves as a handy study guide for drilling and well control certification courses. In geotechnical engineering, drilling fluid, also called drilling mud, is used to aid the drilling of boreholes into the earth. Formulas and calculations for drilling, production, and workover, all the formulas you need to solve drilling and production problems, fourth edition.
The most common mud engineering calculations are those concerned with the changes of mud volume and density caused by the addition of various solids or liquids to the system. Introduction drilling fluid function and performance iadc. In this section you find the drilling formulas and definitions needed for your drilling operations, such as cutting speed, feed per revolution and specific cutting force. Also, if you want to learn more about upstream operations such as directional drilling, production, etc. The kill weight of the mud can also be converted back to pounds per square inch to obtain an estimation of the formation pressure. A program for drilling fluids engineers and drilling fluids companies mud engineer can produce an api style report for obm or wbm in a few minutes.
To fulfill these tasks, carefully chosen additives are incorporated into the mud to control its properties. Compact and readable, formulas and calculations for drilling, production and workover, 3rd edition is a problem solving time saving tool for the most basic or complex predicaments encountered in the field. First, drilling fluids are described as to their functions and properties. Pdf formulas and calculations for drilling production and. Formulas and calculations 6 convert pressure, psi, into mud weight, ppg using meters as the unit of measure mud weight, ppg pressure, psi. These are two important concepts that are fundamental to drilling operations. Drilling mud compositions depend entirely on what is required of it.
It controls wellbore pressure, lubricates and cools the drill bit, carries the drill cuttings, and other essential functions. The formulas and calculations are provided in either english field units or in metric units. The trenchless technique horizontal directional drilling. Mud conditioning equipment function of drilling mud cool bit and its teeth. The components of a horizontal drilling rig used for pipeline construction are similar to those of an oil well drilling rig with the major exception being that a horizontal drilling rig is equipped with an inclined ramp as opposed to a vertical mast. There is also pneumatic drilling fluid which requires specialised equipment so is far more expensive. Build up a vertical section is drilled, then, starting at the kick off point, the angle of incidence to the vertical is. The volume includes equations for problems such as mud weight, hydrostatic pressure, pressure gradients, annular velocity, control drilling, and circulating hydraulic horsepower. Since an overview of all possible risks in horizontal directional drilling would be extensive, this paper focuses on the. Drilling fluids are a vital part of drilling operations. Online drilling formulas for oilfield people by admin on march 9, 2015 input the data in the cells below and click calculate to calculate the effective mud density. Theory the density of the drilling fluid must be controlled to provide adequate.
Formulas calculations for drilling, production workover gateaiotspe. The mud chemicals inventory is built in, daily cost and recaps, receipts and transfers. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids are also used for much simpler boreholes, such as water wells. The work provides personnel in the field with practical stepbystep instructions for performing critical calculations for important drilling and production tasks. This chapter presents basic calculations used in the field of drilling fluids. Presented in an easytouse format, this second edition of formulas and calculations for drilling operations is a quick reference for daytoday work out on the rig. It is the mud engineers responsibility to ensure that. Assume a well has taken a kick at 10,000 ft 3,048 m while drilling with 11. Locations the relative locations of the target and relief wells are calculated. Kick handling with losses in hpht environment ng, fred. Horizontal directional drilling plan february 29, 2012. The hdd equipment arrives on site aboard multiple trucks. Lets make it simple so i still use the same information as my previous post.
Engineering calculations agip kco well area operations drilling muds engineering calculationsmap1 drilling supervisors training course rpw2021a 1 introduction this section is a guide for calculations regarding the drilling fluid such as capacity of mud, tanks volumes, tubulars and holes, circulation times, velocity of the mud in the annular and in the drill pipes. Pressure required to break circulation inside drillstring. Purchase formulas and calculations for drilling, production and workover 2nd edition. Light weight spot fill to balance formation pressure. To know how to calculate drilling speeds and feeds is critical for successful drilling. This weight is added to the mud weight currently in the hole to obtain the kill weight needed. Hdd pilot hole operations are not unlike those involved in drilling a directional oil well. Drilling action requires mechanical energy in form of weight on bit, rotation and hydraulic energy. Mud weight, ppg, increase with barite average specific gravity of barite 4. After classifying the risks, mitigation measures can be established for the significant risks.